It took us over a decade of chasing grants and sponsorship and anywhere else we could get funds in order to get the $$$$$ to fix the drainage issues we had (and that was only on 1 of our 2 grounds).
Since then we have been a bit luckier in gaining grants allowing us to build our grandstand and electronic scoreboard.
But applying and monitoring these grants are a massive slog to the point we were paying someone to continually apply and monitor all the grants he could and without him we never would have got 75% of the ones we did.
So it isn’t easy at all to simply fix the drainage but I highly recommend getting someone in place to continually chase grants because it really benefits you in the long run.